Analysis of Thermal Bridges - Scottish Energy Systems Group ...

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Examples Example 1 Tie in Wall Construction • Heat flow through the bridge material is not proportional to the cross section area of the material. • Heat flow need not be perpendicular to lay of bridge. Example 2 Structural beam below window © RenSolutions UK Scottish Energy Systems Group samuel@esru.strath.ac.uk
References • Applicable standard BS EN ISO 10211 Thermal bridges in building construction. Heat flows and surface temperatures. General calculation methods, EN ISO 14683 Thermal bridges in building construction. Linear thermal transmittance. Simplified methods and default values. Combined method, BS EN ISO 6946 • More complicated EN ISO 13370 Thermal performance of buildings. Heat transfer via the ground. Calculation methods • CIBSE Guide A – Environmental Design • BRE IP 17/01 Assessing the effects of thermal bridging at junctions and around openings • Conventions for calculating linear thermal transmittance and temperature factors. BRE 497 • MCRMA Technical Paper # 18. Conventions for calculating U-values, f- values and psi-values. • Energy Savings Trust, Enhanced Construction Details • Building Research Establishment – Approved certifier of design Scottish Energy Systems Group samuel@esru.strath.ac.uk
Page 1 and 2: Scottish Energy Systems Group ... e
Page 3: Thermal Bridging Effect of Thermal
Page 7 and 8: Types of Thermal Bridges 3. Systema
Page 9 and 10: Theoretical Overview • One dimens
Page 11 and 12: Q One dimensional heat transfer Fou
Page 13 and 14: Standard Surface resistances Direct
Page 15 and 16: When is three dimensional analysis
Page 17 and 18: Linear thermal transmittance (ψ or
Page 19 and 20: H H TB TB = ΣLψ = yΣ SAP calcula
Page 21 and 22: SAP calculations example H H TB TB
Page 23 and 24: SBEM calculations example Scottish
Page 25 and 26: 2D heat transfer software THERM Fre
Page 27 and 28: THERM 2 Solution Procedure A PC pro
Page 29 and 30: Worked Example Eaves detail (BRE 49
Page 31 and 32: BRE 497 Roof junction boundary cond
Page 33 and 34: Working with THERM Open BRE Validat
Page 35 and 36: Important notes A THERM model conta
Page 37 and 38: Technical Parameters Select Options
Page 39 and 40: Isotherms Scottish Energy Systems G
Page 41 and 42: Temperature Scottish Energy Systems
Page 43 and 44: Calculation of f value f min = T in
Page 45 and 46: Materials library Select Libraries
Page 47 and 48: Boundary Condition library Select L
Page 49 and 50: Inputting geometry Set snap on: Opt
Page 51 and 52: Model Attribution (BC) 1. Click on
Page 53 and 54: 4. Rerun simulation 5. Press the U
Page 55 and 56:
PassivHaus construction example AWm
Page 57 and 58:
Construction DAm02 DAm02: 1. PE sea
Page 59 and 60:
U factors Define these two surfaces
Page 61 and 62:
Miscellaneous notes It is possible
Page 63 and 64:
Worksheet • Q4. What are the dime
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